
 Slope algorithm
to use for downhill drainage vectors. This can be
different than that used for other operations. You should
be very careful changing this.
 Show
 Point slopes: slope is computed at a point. The
vector length isproportional to the slope at the point.
 Region vector average: slope is computed at all points in a
box, and the vector average is plotted. The vector
magnitude is proportional to the resultant vector magnitude (1
if all vectors point in the same direction, 0 if they are
completely randomly distributed).
 Distance in map pixels that DEM grid postings will be
separated when a vector will be drawn. This
effectively reduces the number of vectors drawn. Zooming in
will have vectors drawn closer together in gound distance.
 For each computation method
 Vector color and line width
 Length of vectors (scaling factor)
 Region size
 For point slopes, this is the distance to go out to pick
the 8 points to use in the slope algorithm
 For region vector averages, this is the size of the
region to use with computation of every point.
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